This mod gives you the ability to build both races ships ie. If you play as the Hiigarans you can research and build Hiigaran ships but you can choose to research and build Vaygr ships and platforms,etc.. instead instead or a mixture of ships from both races.
If you play as the Vaygr then you can not only research and build Vaygr ships but build and research Hiigarn ships,platforms,etc.. instead or a mixture of ships from both races.Also most of the Keeper and Progenitor ships can be build as well in multiplayer.